Computing device employing a self-spacing hinge assembly

ABSTRACT

The description relates to hinged devices, such as hinged computing devices. One example can include a first portion and a second portion. The example can also include a pair of self-spacing hinge assemblies rotatably securing hinge ends of the first and second portions and camming the first and second hinge ends apart from one another at non-parallel orientations of the first and second portions sufficient to prevent contact of the first and second hinge ends at the non-parallel orientations while allowing the first and second hinge ends to contact one another at other orientations.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings illustrate implementations of the concepts conveyed in the present document. Features of the illustrated implementations can be more readily understood by reference to the following description taken in conjunction with the accompanying drawings. Like reference numbers in the various drawings are used wherever feasible to indicate like elements. Further, the left-most numeral of each reference number conveys the FIG. and associated discussion where the reference number is first introduced.

FIGS. 1, 2A-2D, 4A, 5A, 6A, and 7A show perspective views of example devices in accordance with some implementations of the present concepts.

FIG. 3 shows an exploded perspective view of an example device in accordance with some implementations of the present concepts.

FIGS. 4B, 4C, 5B, 5C, 6B, 6C, 7B, and 7C show elevational views of example devices in accordance with some implementations of the present concepts.

DESCRIPTION

The present concepts relate to devices, such as computing devices employing hinge assemblies that can rotationally secure first and second device portions relative to a first hinge axis that relates to the first portion and a second hinge axis that relates to the second portion. From one perspective, some of the present hinge assemblies can be viewed as being ‘self-spacing’ in that the hinge controls spacing between the first and second portions during rotation to prevent damage to the device.

Introductory FIG. 1 shows an example device 100 that has first and second portions 102 and 104 that are rotatably secured together by self-spacing hinge assemblies 106. In this implementation, two self-spacing hinge assemblies 106(1) and 106(2) are employed. Other implementations can employ a single self-spacing hinge assembly or more that two self-spacing hinge assemblies.

The first portion 102 can extend from a hinge end 108 to a distal end 110. The second portion 104 also can extend from a hinge end 112 to a distal end 114. The hinge assembly 105 can define two hinge axes 116. The first portion 102 can rotate around first hinge axis 116(1) and the second portion 104 can rotate around second hinge axis 116(2). The first portion 102 can include opposing first and second major surfaces 118 and 120 (hereinafter, first and second surfaces). Similarly, the second portion 104 can include opposing first and second major surfaces 122 and 124 (hereinafter, first and second surfaces). (Note the second surfaces 120 and 124 are facing away from the viewer and as such are not directly visible in this view, but are shown and designated in subsequent FIGS.).

In some implementations, displays 126 can be positioned on the first and/or second surfaces. In this case, displays 126(1) and 126(2) are interposed between the self-spacing hinge assemblies 106(1) and 106(2). In the illustrated configuration, the displays 126 are positioned on first surfaces 118 and 122, respectively.

FIGS. 2A-2D collectively show a use case scenario of device 100. FIG. 2A starts with device 100 in the closed orientation where the first and second portions 102 and 104 are positioned against one another and are rotatably secured by self-spacing hinge assembly 106. In this case, the second surfaces are facing outwardly with the first portion's second surface 120 facing the reader and the first surfaces (designated in FIG. 2B) facing inwardly. The closed orientation can be very compact and easy for the user 202 to transport. For instance, the device may fit in the user's pocket. Further, the first surfaces can be protected in this closed orientation by the second surfaces. The device can be biased to maintain this orientation until acted upon by the user. At this point user 202 is starting to open the device 100 (e.g., rotate the device portions 102 and 104 away from one another).

FIG. 2B shows the device 100 opened to an angle α defined between the first and second portions 102 and 104 of about 110 degrees. This orientation can be thought of as a ‘notebook’ or ‘laptop’ orientation. The notebook orientation can be manifest as an angle in a range from about 90 degrees to about 150 degrees. In this case, the device portions 102 and 104 are configured to maintain this relative orientation while the user 202 uses the device. In this example, video content is presented on a GUI 204(1) on display 126(1) of the first portion 102 and a virtual keyboard is presented on display 126(2) on second portion 104. The user can control GUI 204(1) via the virtual keyboard of GUI 204(2).

FIG. 2C shows the device 100 rotated until the relative angle α is about 180 degrees between the first and second portions 102 and 104. In this orientation, a single GUI 204(3) can be presented collectively across displays 126(1) and 126(2). This GUI 204(3) offers basically twice the display area of either device portion 102 or 104. The device can be biased to maintain this fully open orientation for viewing, yet when not utilized by the user 202, the user can close the device 100 to a compact easy to carry configuration (e.g., see FIG. 2A) that protects the displays 126 from damage.

FIG. 2D shows another orientation where the angle α is about 270 degrees (or in a range from about 240 degrees to about 330 degrees). This orientation can be thought of as an ‘alarm clock’ orientation where the device stands on its own and the displays 126 are readily visible to the user.

Note that while obscured by the displays 126, several electronic components, such as circuit boards, processors, and/or storage/memory can be secured to the first and second portions 102 and/or 104.

The processor can generate GUIs 204 for presentation on the displays 126. In some implementations, the processor may generate different GUIs for the displays when the first and second portions 102 and 104 are in some orientations and a single GUI for a combined presentation in other orientations. For instance, when the first and second portions are oriented at 90 degrees relative to one another, the processor may generate a first GUI for presentation on the first portion and a second GUI for presentation on the second portion. When the first and second portions are oriented to 180 degrees, the processor can generate a single GUI that is collectively presented across both displays to create a larger display area. In other orientations, such as the alarm clock orientation, the same GUI may be presented on both the first and second portions. For instance, the time could be presented on both portions so that it is visible from more positions around the device.

Stated another way, in some configurations, the first surfaces 118 and 122 can be manifest as displays 126, such that in the fully open orientation of FIG. 2C the displays can work cooperatively to create a larger (e.g., 2 x) display area. In some cases, the second surfaces 120 and 124 can be manifest as protective covers so that in the orientation of FIG. 2A the protective covers protect the displays of the first surfaces. In other configurations, both the first and second surfaces can include displays, or neither can include displays.

FIGS. 3-7C collectively show another example self-spacing hinge assembly 106(1).

FIG. 3 is an exploded view that shows details of example self-spacing hinge assembly 106(1). The self-spacing hinge assembly 106(1) can include a communication member 302 and first and second hinge bodies 304(1) and 304(2). The self-spacing hinge assembly 106(1) can include a timing element 305 that synchronizes rotation (e.g., extent of rotation) of the first and second portions 102 and 104 around the first and second hinge axes 116. For instance, the timing element 305 can ensure that 20 degrees of rotation around the first hinge axis simultaneously produces 20 degrees of rotation around the second hinge axis. In the various implementations, the timing element can be manifest as gears. Various types of gears may include spur gears, worm gears, and/or ball and screw gears. Alternatively or additionally, other timing elements can employ cams and sliders. In the illustrated implementation, gears are employed as the timing element. In this case, the hinge bodies can define primary gears 306 that can interact with intervening or secondary gears 308. The secondary gears 308 are rotatably secured to communication member 302 by parallel posts 310 that engage receptacles 312 in the communication member. (Only receptacle 312(2) is visible in FIG. 3). The secondary gears are retained in the communication member by retainer 314 and/or by flanges on the communication member. Thus, the retainer 314 operating in cooperation with the communication member 302 can secure the secondary gears 308 in engaging relation with one another and with the primary gears 306.

The communication member 302 can also be shaped to receive a conductor, such as discrete or coaxial wires and/or a flexible printed circuit (FPC) 315. The conductor can connect displays and/or other electronic components on the first portion 102 with displays and/or other electronic components on the second portion 104.

The communication member 302 can include hinge pins 316 that pass through the primary gears 306 and apertures 318 in the first and second hinge bodies 304. The hinge pins can be integrated as a part of the communication member or the hinge pins can be separate pieces that are assembled to the communication member. In some implementations, the apertures 318 can be sized so the that the hinge bodies 304 act as friction cylinders for the hinge pins 316 (e.g., provide a degree of frictional resistance that can hold the portions in an existing orientation unless acted upon by the user). Further, the timing provided by the interaction of the primary gears 306 with the secondary gears 308 and the secondary gears with one another causes equal or symmetric rotation around each hinge axis 116. For instance, ten degrees of rotation around hinge axis 116(1) is accompanied by ten degrees of rotation around hinge axis 116(2). Other timing mechanisms are contemplated. For example, other implementations can employ primary gears that directly intermesh with one another to provide the timing.

The communication member 302 can include multi-lobe cams (e.g., cams) 320, which can be secured to the hinge pins 316 in-line with the hinge axes 116. (More details about the cams are shown in FIG. 4C). The cams 320 can operate on cam follower 322 of spring body 324. A biasing element 325 can be employed to bias the hinge ends 108 and 112 of the first and second portions 102 and 104 toward the hinge axes (see FIG. 1). Spring retainer or guide 326 retains a spring 328 between hinge body 304 and spring body 324. Fasteners 330 can secure the spring bodies 324 in a fixed relation to the respective first and second portions 102 and 104. Fasteners 332 can slideably secure hinge bodies 304 to the first and second portions 102 and 104 via washers 334. In this case, fasteners 332 can be implemented as shoulder screws so that the fastener does not clamp down on the hinge body. Further, the hinge body defines elongate slots 336 through which the fasteners pass. This configuration allows the hinge bodies 304 to slide relative to the first and second portions orthogonally to the hinge axes 116. This movement can be facilitated by employing a low friction material and/or coating on washers 334 which are interposed between the hinge bodies 304 and the respective first and second portions 102 and 104. Stated another way, the combination of shoulder screws, elongate slots, and/or low friction washers can provide minimal clearance so that the hinge body 304 has a single degree of freedom with respect to the first and second portions 102 and 104. Thus, the spring 328 can function as the biasing element 325 that biases the spring body 324 and thereby the first and second portions toward the hinge axes 116. Example biasing elements can include compression springs, disk springs as shown or some other kind of spring, and/or a piece of foam, such as poron.

As mentioned above, spring bodies 324 are fastened to the first and second portions 102 and 104 by fasteners 330. As will be described below in more detail relative to FIGS. 4A-7C, at certain orientations, such as acute, perpendicular, and/or obtuse angles/orientations (e.g., non-parallel orientations), cams 320 can force cam followers 322 and spring bodies 324 apart, which thereby moves the first and second portions apart. At other orientations, such as zero degrees, 180 degrees, and/or 360 degrees (e.g., parallel orientations), lacking the camming action, springs 328 can bias the spring bodies 324 and hence the first and second portion 102 and 104 toward one another.

FIGS. 4A-7C collectively show how cams 320 can move the first and second portions 102 and 104 apart from one another at specific orientations as the first and second portions are rotated through a range of rotation. FIGS. 4A-4C show the first and second portions at a zero-degree orientation similar to FIG. 2A with the first surfaces 118 and 122 facing inwardly and the second surfaces 120 and 124 facing outwardly. FIG. 4A is a perspective view, FIG. 4B is a side elevational view (e.g., parallel to the hinge axes 116), and FIG. 4C is a bottom elevational view (e.g., along the hinge axes). FIGS. 5A-5C are similar views to FIGS. 4A-4C at a 90-degree orientation rather than a zero-degree orientation. Similarly, FIGS. 6A-6C and 7A-7C are similar views at 180 and 360-degree orientations, respectively. Thus, FIGS. 5A-5C show an example orientation between zero and 180 degrees where cams 320 can move the first and second portions away from one another to reduce and/or prevent damage. The cams can perform this movement at oblique and perpendicular orientations and not perform the movement when the first and second portions are parallel to one another (e.g., parallel and overlapping at zero degrees (FIGS. 4A-4C) and 360 degrees (FIGS. 7A-7C) and parallel and abutting at 180 degrees (FIGS. 6A-6C).

Looking at FIG. 4C, cams 320 are shown in enlarged form so that details can be more readily visualized. In this case, cams 320 can be multi-lobed cams that can include two or more cam lobes 402 and cam recesses 404. In the illustrated implementation, the cam lobes 402(1) and 402(2) are interposed between cam recesses 404(1) and 404(3) and cam recess 404(2) is interposed between the cam lobes 402(1) and 402(2) to form a clover-leaf configuration. (The suffix ‘A’ is used in association with cam 320(1) and the suffix ‘B’ is used in association with cam 320(2)). Also in the illustrated implementation, the cams 320 are symmetric relative to a plane that is parallel to the x and z reference axes and passes through cam recess 404(2) (e.g., the cams are bilaterally symmetrical). Other numbers of cam lobes, cam recesses, and/or relative orientations of cam lobes and cam recesses are contemplated.

In the zero-degree orientation of FIGS. 4A-4C, cam followers 322 are positioned in cam recesses 404(3) which allows springs 328 to bias spring bodies 324 toward hinge axes 116. Recall that the spring bodies 324 are fixedly secured to the first and second portions 102 and 104 so the springs also bias the first and second portions 102 and 104 toward the hinge axes 116(1) and 116(2), respectively.

FIGS. 5A-5C show self-spacing hinge assembly 106(1) where the first and second portions 102 and 104 have been rotated 90 degrees apart relative to the zero-degree orientation of FIGS. 4A-4C. Note also, that in the illustrated implementation both portions rotate equally (e.g., in this case each portion rotates 45 degrees of the 90 total degrees). At this point cam lobes 402(2) are acting on cam followers 322 thereby forcing the cam followers 322(1) and 322(1) away from the respective hinge axes 116(1) and 116(2). Recall that the cam followers 322 are part of the spring bodies 324, which are fixedly attached to the first and second portions 102 and 104. Thus, forcing the cam followers 322 away from the hinge axes 116 forces the first and second portions away from hinge axes 116(1) and 116(2), respectively as indicated by arrows 502(1) and 502(2). Forcing the first and second portions away from the hinge axes can reduce and/or eliminate contact between the device portions which would otherwise occur on the hinge ends of the inwardly facing surfaces of the first and second portions as indicated at 504 of FIG. 5C. Reducing and/or eliminating this contact can prevent damage to these inwardly facing surfaces. For instance, displays on these surfaces could easily crack or chip if exposed to forces of the contact. The present implementations can protect these displays from damage.

FIGS. 6A-6C show the first and second portions 102 and 104 rotated to a 180-degree orientation. At this orientation, the first and second portions are positioned side-by-side. As mentioned in the discussion above relative to FIG. 2C, in this 180-degree orientation, displays on the first and second portions can be operated cooperatively to simulate a single larger display. In such a scenario, it can be desirable for the first and second portions to be close to one another and even touching one another to create a nearly seamless collective display. Toward this end, in this case, cam followers 322 are now positioned in cam recesses 404(2). This allows springs 328 to bias the spring bodies 324 and hence the first and second portions toward one another as indicated by arrows 602(1) and 602(2). The first and second portions being biased toward one another, and potentially against one another, can reduce any gap indicated at 604 between the first and second portions that diminishes the user experience provided by the simulated collective display.

FIGS. 7A-7C show a 360-degree orientation which is similar to the zero-degree orientation of FIGS. 4A-4C except that second surfaces 120 and 124 are facing toward one another and first surfaces 118 and 122 are facing outwardly. At this orientation, the cam followers 322 are in cam recesses 404(1), which allows springs 328 to bias the spring bodies 324 and the first and second portions 102 and 104 toward the hinge axes 116(1) and 116(2), respectively.

Note that representative orientations are illustrated. Generally, the cams 320 force the first and second portions 102 and 104 apart (e.g. away from the hinge axes 116) during non-parallel orientations and let the first and second portions be biased towards one another (e.g., toward the hinge axes) at other angles where the first and second portions are parallel to one another to one another. For instance, starting at the zero-degree orientation of FIGS. 4A-4C where the first and second portions are parallel to one another, the cams allow the springs 328 to bias the first and second portions toward the hinge axes. As rotation starts, so can the camming action. In this case, the extent of the camming action can increase as rotation continues to 90 degrees (e.g., FIGS. 5A-5C) and then begin to decrease as rotation continues to 180 degrees. Stated another way, camming may not occur at the parallel orientation of zero degrees and the parallel orientation of 180 degrees of FIGS. 6A-6C, but can occur in at least some of the intervening orientations. The extent of the cam lobe lift, cam lobe shape, and/or the duration (e.g., number of degrees) can be determined by the cam profile to reduce or minimize damage to the first and second portions from contact forces. A similar configuration can be employed between 180 degrees and 360 degrees (FIGS. 7A-7C).

Note that for sake of brevity not all orientations can be illustrated, however, the present concepts can provide camming action at non-parallel orientations (e.g., acute, perpendicular, and/or obtuse) of the first and second portions 102 and 104 to reduce and/or eliminate contact damage to the first and second portions. The movement could occur at all non-parallel orientations. For instance, movement could occur from 1 degree to 179 degrees and/or from 181 degrees to 359 degrees. Alternatively, the movement could occur at a subset of these orientations where damage is more likely to occur. For example, movement could occur at 45 degrees to 135 degrees and/or 225 degrees to 315 degrees, among others. At parallel orientations, the cams 320 can allow the first and second portions to be biased toward/against one another.

Individual elements of the hinge assembly 106 can be made from various materials, such as metals, plastics, and/or composites. These materials can be prepared in various ways, such as in the form of sheet metals, die cast metals, machined metals, 3D printed materials, molded or 3D printed plastics, and/or molded or 3D printed composites, among others, or any combination of these materials and/or preparations can be employed.

The present hinge assembly concepts can be utilized with any type of device, such as but not limited to notebook computers, smart phones, wearable smart devices, tablets, and/or other types of existing, developing, and/or yet to be developed devices.

Various methods of manufacture, assembly, and/or use for hinge assemblies and devices are contemplated beyond those shown above relative to FIGS. 1-7C.

Although techniques, methods, devices, systems, etc., pertaining to hinge assemblies are described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not limited to the specific features or acts described. Rather, the specific features and acts are disclosed as example forms of implementing the claimed methods, devices, systems, etc.

Various device examples are described above. Additional examples are described below. One example includes a device comprising a first portion and a second portion, and a self-spacing hinge assembly rotatably securing hinge ends of the first and second portions around a first hinge axis associated with the first portion and a second hinge axis associated with the second portion so that an extent of rotation around the first hinge axis corresponds to an extent of rotation around the second hinge axis. The self-spacing hinge assembly comprises a communication member that defines first and second hinge pins. The first hinge pin defines the first hinge axis and includes a first cam in line with the first hinge axis, a first cam follower fixed to the first portion, and a first biasing element that biases the first portion toward the first hinge axis. The first cam comprises alternating cam lobes and cam recesses, and at non-parallel orientations of the first and second portions individual cam lobes of the first cam engage the first cam follower and overcome the first biasing element and force the first portion away from the first hinge axis to increase space between the first and second portions. At parallel orientations, the first cam follower engages individual cam recesses of the first cam, and the first biasing element biases the first portion toward the first hinge axis and decreases the space between the first and second portions.

Another example can include any of the above and/or below examples where the parallel orientations comprise zero degrees, 180 degrees, and/or 360 degrees.

Another example can include any of the above and/or below examples where the non-parallel orientations comprise acute orientations, perpendicular orientations, and/or obtuse orientations.

Another example can include any of the above and/or below examples where the device further comprises a second hinge pin defining the second hinge axis and comprises a second cam in line with the second hinge axis, a second cam follower fixed to the second portion, and a second biasing element that biases the second portion toward the second hinge axis.

Another example can include any of the above and/or below examples where the device further comprises a second cam comprising alternating cam lobes and cam recesses, and at the non-parallel orientations of the first and second portions, individual cam lobes of the second cam engage the second cam follower and overcome the second biasing element and force the second portion away from the second hinge axis to increase space between the first and second portions. At the parallel orientations, the second cam follower engages individual cam recesses of the second cam, and the second biasing element biases the second portion toward the second hinge axis and decreases the space between the first and second portions.

Another example can include any of the above and/or below examples where the first and second hinge pins each include primary gears that provide timing of the self-spacing hinge assemblies so that the extent of rotation around the first hinge axis corresponds to the extent of rotation around the second hinge axis.

Another example can include any of the above and/or below examples where the primary gears directly engage to provide the timing.

Another example can include any of the above and/or below examples where the device further comprises intervening secondary gears and where the primary gears indirectly engage via the intervening secondary gears to provide the timing.

Another example can include any of the above and/or below examples where the first portion comprises a first display and wherein the second portion comprises a second display.

Another example can include any of the above and/or below examples where the first biasing element comprises a first spring that is oriented orthogonally to the first hinge axis and a second biasing element comprises a second spring that is oriented orthogonally to a second hinge axis.

Another example can include any of the above and/or below examples where the first hinge pin is received in a first hinge body, and a second hinge pin is received in a second hinge body, and the first cam follower comprises a first spring body, and a second cam follower comprises a second spring body, and where the first spring is positioned between the first hinge body and the first spring body, and the second spring is positioned between the second hinge body and the second spring body.

Another example can include any of the above and/or below examples where the first hinge body is slideably secured in the first portion and the second hinge body is slideably secured in the second portion.

Another example can include any of the above and/or below examples where the first cam is bilaterally symmetrical.

Another example can include a device comprising a first portion and a second portion and further comprising a communication member spanning between the first and second portions and defining first and second parallel hinge pins. The first hinge pin includes a first multi-lobe cam that forces the first portion away from the second portion when the first and second portions are oriented at individual non-parallel orientations and allows the first portion to approach the second portion at individual parallel orientations.

Another example can include any of the above and/or below examples where the second hinge pin includes a second multi-lobe cam that forces the second portion away from the first portion when the first and second portions are oriented at individual non-parallel orientations and allows the first portion to approach the second portion at individual parallel orientations.

Another example can include any of the above and/or below examples where the individual non-parallel orientations comprise all orientations between 1 degree and 179 degrees or a subset of orientations from 1 degree to 179 degrees.

Another example can include any of the above and/or below examples where the communication member includes a timing element that causes equal rotation by the first and second portions.

Another example can include any of the above and/or below examples where the timing element comprises gears.

Another example can include a device comprising a first portion that includes a first display, a second portion that includes a second display, and, a pair of self-spacing hinge assemblies rotatably securing first and second hinge ends of the first and second portions and camming the first and second hinge ends apart from one another at non-parallel orientations sufficient to prevent contact of the first and second hinge ends at the non-parallel orientations while allowing the first and second hinge ends to contact one another at other angles.

Another example can include any of the above and/or below examples where the pair of self-spacing hinge assemblies further comprises multi-lobe cams that are contacted by cam followers positioned on the first and/or second portions.

Another example can include any of the above and/or below examples where the non-parallel orientations comprise all non-parallel orientations between zero degrees and 180 degrees, or where the non-parallel orientations comprises a subset of all of the non-parallel orientations. 

The invention claimed is:
 1. A device, comprising: a first portion and a second portion; a self-spacing hinge assembly rotatably securing hinge ends of the first and second portions around a first hinge axis associated with the first portion and a second hinge axis associated with the second portion so that an extent of rotation around the first hinge axis corresponds to an extent of rotation around the second hinge axis; the self-spacing hinge assembly comprising a communication member that defines first and second hinge pins; the first hinge pin defining the first hinge axis and including a first multi-lobe cam in line with the first hinge axis; a first cam follower fixed to the first portion; a first biasing element that biases the first portion toward the first hinge axis; and, the first multi-lobe cam comprising alternating cam lobes and cam recesses, and at non-parallel orientations of the first and second portions, individual cam lobes of the first multi-lobe cam engage the first cam follower and overcome the first biasing element and force the first portion away from the first hinge axis to increase space between the first and second portions and at parallel orientations the first cam follower engages individual cam recesses of the first multi-lobe cam and the first biasing element biases the first portion toward the first hinge axis and decreases the space between the first and second portions.
 2. The device of claim 1, wherein the parallel orientations comprise zero degrees, 180 degrees, and/or 360 degrees.
 3. The device of claim 1, wherein the non-parallel orientations comprise acute orientations, perpendicular orientations, and/or obtuse orientations.
 4. The device of claim 1, further comprising the second hinge pin defining the second hinge axis and comprising: a second multi-lobe cam in line with the second hinge axis, a second cam follower fixed to the second portion; and, a second biasing element that biases the second portion toward the second hinge axis.
 5. The device of claim 4, further comprising the second multi-lobe cam comprising alternating cam lobes and cam recesses, and at the non-parallel orientations of the first and second portions individual cam lobes of the second multi-lobe cam engage the second cam follower and overcome the second biasing element and force the second portion away from the second hinge axis to increase space between the first and second portions and at the parallel orientations the second cam follower engages individual cam recesses of the second multi-lobe cam and the second biasing element biases the second portion toward the second hinge axis and decreases the space between the first and second portions.
 6. The device of claim 1, wherein the first and second hinge pins each include primary gears that provide timing of the self-spacing hinge assemblies so that the extent of rotation around the first hinge axis corresponds to the extent of rotation around the second hinge axis.
 7. The device of claim 6, wherein the primary gears directly engage to provide the timing.
 8. The device of claim 6, further comprising intervening secondary gears and wherein the primary gears indirectly engage via the intervening secondary gears to provide the timing.
 9. The device of claim 1, wherein the first portion comprises a first display and wherein the second portion comprises a second display.
 10. The device of claim 1, wherein the first biasing element comprises a first spring that is oriented orthogonally to the first hinge axis and a second biasing element comprises a second spring that is oriented orthogonally to a second hinge axis.
 11. The device of claim 10, wherein the first hinge pin is received in a first hinge body and a second hinge pin is received in a second hinge body and the first cam follower comprises a first spring body and a second cam follower comprises a second spring body and wherein the first spring is positioned between the first hinge body and the first spring body and the second spring is positioned between the second hinge body and the second spring body.
 12. The device of claim 11, wherein the first hinge body is slideably secured in the first portion and the second hinge body is slideably secured in the second portion.
 13. The device of claim 1, wherein the first multi-lobe cam is bilaterally symmetrical.
 14. A device, comprising: a first portion and a second portion; and, a communication member spanning between the first and second portions and defining first and second parallel hinge pins, the first hinge pin including a first multi-lobe cam that forces the first portion away from the second portion when the first and second portions are oriented at individual non-parallel orientations and allows the first portion to approach the second portion at individual parallel orientations.
 15. The device of claim 14, wherein the second hinge pin includes a second multi-lobe cam that forces the second portion away from the first portion when the first and second portions are oriented at individual non-parallel orientations and allows the first portion to approach the second portion at individual parallel orientations.
 16. The device of claim 15, wherein the individual non-parallel orientations comprise all orientations between 1 degree and 179 degrees or a subset of orientations from 1 degree to 179 degrees.
 17. The device of claim 15, wherein the communication member includes a timing element that causes equal rotation by the first and second portions.
 18. The device of claim 17, wherein the timing element comprises gears.
 19. A device, comprising: a first portion that includes a first display; a second portion that includes a second display; and, a pair of self-spacing hinge assemblies rotatably securing first and second hinge ends of the first and second portions and camming the first and second hinge ends apart from one another at non-parallel orientations of the first and second portions sufficient to prevent contact of the first and second hinge ends at the non-parallel orientations while biasing the first and second hinge ends toward one another at other angles.
 20. The device of claim 19, wherein the pair of self-spacing hinge assemblies further comprise multi-lobe cams that are contacted by cam followers positioned on the first and/or second portions.
 21. The device of claim 19, wherein at least one of the other angles comprises a parallel orientation of the first and second portions where the first portion is oriented 180 degrees from the second portion. 